Maximum unambiguous velocity: Difference between revisions

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|Meaning=The maximum range of [[radial velocity]] that can be observed  without ambiguity by a [[Doppler radar]], [[sodar]], or [[lidar]].
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|Explanation=Velocities outside this interval are folded into the interval. For a [[pulsed radar]] or sodar operating  with an [[interpulse period]] ''T,'' or a lidar with an [[A/D converter]] sampling interval ''T,'' the [[unambiguous velocity interval|unambiguous  velocity interval]] is -&lambda;/4''T'' to +&lambda;/4''T'', where &lambda; is the operating [[wavelength]]. This interval  can be extended by the use of dual [[PRF]] and other techniques. <br/>''See'' [[velocity aliasing]], [[Nyquist frequency|Nyquist  frequency]].
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== maximum unambiguous velocity ==
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<div class="definition"><div class="short_definition">The maximum range of [[radial velocity]] that can be observed  without ambiguity by a [[Doppler radar]], [[sodar]], or [[lidar]].</div><br/> <div class="paragraph">Velocities outside this interval are folded into the interval. For a [[pulsed radar]] or sodar operating  with an [[interpulse period]] ''T,'' or a lidar with an [[A/D converter]] sampling interval ''T,'' the [[unambiguous  velocity interval]] is -&lambda;/4''T'' to +&lambda;/4''T'', where &lambda; is the operating [[wavelength]]. This interval  can be extended by the use of dual [[PRF]] and other techniques. <br/>''See'' [[velocity aliasing]], [[Nyquist  frequency]].</div><br/> </div>
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Latest revision as of 11:43, 29 March 2024

The maximum range of radial velocity that can be observed without ambiguity by a Doppler radar, sodar, or lidar.

Velocities outside this interval are folded into the interval. For a pulsed radar or sodar operating with an interpulse period T, or a lidar with an A/D converter sampling interval T, the unambiguous velocity interval is -λ/4T to +λ/4T, where λ is the operating wavelength. This interval can be extended by the use of dual PRF and other techniques.
See velocity aliasing, Nyquist frequency.

The time rate of change of a position vector; that is, a change of position expressed in terms of speed and direction.

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